<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img
          src="../assets/heima.png"
          alt=""
        >
        <span>电商平台管理系统</span>
      </div>
      <el-button
        type='info'
        @click="logout"
      >退出</el-button>
    </el-header>
    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff"
      unique-opened
      :collapse-transition="false"
      :collapse="isCollapse"
      router
      :default-active="activePath">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in meauList" :key='item.id'>
        <!-- 一级菜单模板区 -->
        <template slot="title">
          <i :class="iconsObj[item.id]"></i>
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
          <template slot="title">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default ({
  data () {
    return {
      meauList: [],
      iconsObj: {
        '125': 'iconfont icon-yonghu',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-gouwu',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false, // 是否水平折叠收起菜单
      activePath: ''
    }
  },
  created() {
    this.getMeauList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 清空token
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    async getMeauList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error('获取菜单列表失败')
      this.meauList = res.data
      console.log(res)
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
})
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 0;
  font-size: 20px;
  color: #fff;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
  .toggle-button {
    color: #fff;
    font-size: 10px;
    background-color: #4a5064;
    text-align: center;
    line-height: 24px;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
</style>
